MFCでURLをブラウザで開く

bool OpenUrl(LPCTSTR lpszUrl)
{
    HINSTANCE hInst = ShellExecute(NULL,"open",lpszUrl,NULL,NULL,SW_SHOWNORMAL);
    if(hInst < (HINSTANCE)32){    // 32未満は起動に失敗
        return false;
    }
    retuen true;
}